Glad to see the site updated and now I’m officially a member
I picked up a 90’ Yo frameset and seem to have a few people stumped on the serial number. Apparently the 90’ numbers were lower when a “Z” where used...?
I'm not sure on this one. I didn't have anything to do with numbering. Somebody on this site has the old serial number records
That frame does have the old pressed in bottom bracket so it is an early YO